#include <stdio.h>
#include "A.h"
#include "A.c"
#include "B.h"
#include "B.c"
#include "C.h"
#include "C.c"
#include "D.h"
#include "D.c"
int main() 
{
	double a, b;
	scanf("%lf %lf", &a, &b);
//	printf("%.2f\n", Add(a, b));
//	printf("%.2f\n", Sub(a, b));
//	printf("%.4f\n", Mul(a, b));
	printf("%.4f\n", Div(a, b));
	return 0;
}
